You’ve got a deep, angry cyst under your jaw. It hurts to turn your head. You’ve tried toothpaste, ice, and prayer. Now you’re staring at two bottles on the drugstore shelf: La Roche-Posay Effaclar Duo+ and CeraVe Acne Foaming Cleanser. Which one kills that cyst without wrecking your skin barrier? I’ve tested both on hormonal…